merge with wouter/events

1 files changed, 81 insertions, 0 deletions

diff --git a/src/crepe/api/EventManager.cpp b/src/crepe/api/EventManager.cpp
new file mode 100644
index 0000000..e881d49
--- /dev/null
+++ b/src/crepe/api/EventManager.cpp
@@ -0,0 +1,81 @@
+#include "EventManager.h"
+
+using namespace crepe;
+
+EventManager & EventManager::get_instance() {
+	static EventManager instance;
+	return instance;
+}
+
+void EventManager::dispatch_events() {
+	for (std::vector<std::tuple<std::unique_ptr<Event>, int,
+								std::type_index>>::iterator event_it
+		 = this->events_queue.begin();
+		 event_it != this->events_queue.end();) {
+		std::unique_ptr<Event> & event = std::get<0>(*event_it);
+		int channel = std::get<1>(*event_it);
+		std::type_index event_type = std::get<2>(*event_it);
+
+		bool event_handled = false;
+
+		if (channel) {
+			std::unordered_map<
+				std::type_index,
+				std::unordered_map<
+					int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>>::
+				iterator handlers_it
+				= subscribers_by_event_id.find(event_type);
+			if (handlers_it != subscribers_by_event_id.end()) {
+				std::unordered_map<
+					int, std::vector<std::unique_ptr<IEventHandlerWrapper>>> &
+					handlers_map
+					= handlers_it->second;
+				std::unordered_map<
+					int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>::
+					iterator handlers
+					= handlers_map.find(channel);
+				if (handlers != handlers_map.end()) {
+					std::vector<std::unique_ptr<IEventHandlerWrapper>> &
+						callbacks
+						= handlers->second;
+					for (std::vector<std::unique_ptr<IEventHandlerWrapper>>::
+							 iterator handler_it
+						 = callbacks.begin();
+						 handler_it != callbacks.end(); ++handler_it) {
+						if ((*handler_it)->exec(*event)) {
+							event_it = events_queue.erase(event_it);
+							event_handled = true;
+							break;
+						}
+					}
+				}
+			}
+		} else {
+			// Handle event for all channels
+			std::unordered_map<
+				std::type_index,
+				std::vector<std::unique_ptr<IEventHandlerWrapper>>>::iterator
+				handlers_it
+				= this->subscribers.find(event_type);
+			if (handlers_it != this->subscribers.end()) {
+				std::vector<std::unique_ptr<IEventHandlerWrapper>> & handlers
+					= handlers_it->second;
+				for (std::vector<std::unique_ptr<IEventHandlerWrapper>>::
+						 iterator handler_it
+					 = handlers.begin();
+					 handler_it != handlers.end(); ++handler_it) {
+					// remove event from queue since and continue when callback returns true
+					if ((*handler_it)->exec(*event)) {
+						event_it = this->events_queue.erase(event_it);
+						event_handled = true;
+						break;
+					}
+				}
+			}
+		}
+
+		if (!event_handled) {
+			++event_it;
+		}
+	}
+}